Multiple-Choice userfield->Postbit options?

[MTGDarkness]

On a Single-Selection Menu with following options:

none
[Izzet]
[Soundtrack]
[Aesir]
[The Banana]

This is the code I'm using:

<if condition="$post['field9'] & 2">
<!-- Izzet --> <a href="http://forums.mtgdarkness.com/showthread.php?t=21665"><img src="http://img515.imageshack.us/img515/4530/izzeticon.png" alt="[Izzet]" /></a>
</if>


<if condition="$post['field9'] & 4">
<!-- Soundtrack -->	
</if>


<if condition="$post['field9'] & 8">
<!-- aesir -->	
</if>

<if condition="$post['field9'] & 16">
<!-- banana -->	
</if>

It isn't working. >.< Nothing shows up in the source code regardless what you select.

What's wrong with it?